Device for changing broadband spectrum laser light source into tunable laser light source

Abstract

The utility model discloses a device for changing a broadband spectrum laser light source into a tunable laser light source. The device comprises a broadband spectrum laser light source structure, an off-axis parabolic reflector, a reflector shell, a filter turntable, a motor and a focusing seat, one off-axis parabolic reflector is located in the left light path channel of the reflector shell, and the other off-axis parabolic reflector is located in the right light path channel of the reflector shell; the left light path channel is communicated with the right light path channel, and the left light path channel is communicated with a light outlet of the broadband spectrum laser light source structure; the motor is connected with the filter turntable, a plurality of mounting holes are formed in the peripheral direction of the filter turntable, and color filters are connected in the mounting holes; the left half shell is connected with a focusing seat; according to the device, the size of the color filter does not need to be adjusted according to different placing positions of the color filter, multiple groups of color filters can be simultaneously placed through the filter turntable, the use is more convenient, the requirement of emitting light with specified wavelength can be met, and the stability of an optical system cannot be influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of optics, and specifically to a device for converting a wide-spectrum laser light source into a tunable laser light source. Background Art

[0002] Laser light sources have been widely used in various fields of industrial and agricultural production and science and technology. For example, laser processing (cutting, welding, drilling, heat treatment, scribing), nuclear fusion, isotope separation, medical instruments (scalpels, coagulators), detectors, optical fiber communication light sources, holographic photography light sources, stage art light sources, laser video discs, laser fax, laser typesetting and printing, optical computers, laser weapons, etc. When using a wide-spectrum laser light source and only one kind of light is needed, usually a color filter is added to the optical system. However, this operation requires adjusting its size according to the different positions of the color filter. The farther the color filter is from the fiber optic head, the larger the required color filter (the farther the color filter is from the fiber optic head, the more dispersed the light reaching the color filter after the light exits the fiber optic head, so the larger the required color filter). And if the wavelength needs to be changed, it may also be necessary to unplug and replace the color filter (the color filter is generally plugged into a holder, and by unplugging and inserting the color filter on the holder, the color filter can be replaced). The unplugging and inserting process is time-consuming and laborious, and if the operation is improper, it may also affect the stability of the optical system.

[0003] Therefore, there is a need to provide a new device for converting a wide-spectrum laser light source into a tunable laser light source. This device can meet the requirement of making the wide-spectrum laser light source emit only one kind of required light without affecting the stability of the optical system. It is no longer limited to the position of the color filter, does not need to adjust the size of the color filter according to the different positions of the color filter, and can select the required color filter by rotating the filter turntable, thereby meeting the requirement of emitting light of a specified wavelength. The operation is simple and convenient, and it will not affect the stability of the optical system. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a device for converting a wide-spectrum laser light source into a tunable laser light source in view of the above-mentioned prior art. Compared with the previous methods of converting a wide-spectrum laser light source into a tunable laser light source, this device is no longer limited to the position of the color filter, does not need to adjust the size of the color filter according to the different positions of the color filter, and can place multiple groups of color filters on the filter turntable at the same time, which is more convenient to use and has a simpler structure. By rotating the filter turntable to select the required color filter, the requirement of emitting light of a specified wavelength can be met, and the stability of the optical system will not be affected.

[0005] To achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] An apparatus for converting a wide-spectrum laser light source into a tunable laser light source, comprising a wide-spectrum laser light source structure, an off-axis parabolic mirror, a mirror housing, a filter turntable, a motor, and a focusing mount;

[0007] The mirror housing is connected to the wide-spectrum laser light source structure;

[0008] A notch is formed in the middle of the mirror housing, and the notch divides the mirror housing into a left half housing and a right half housing. An L-shaped left optical path channel is formed in the left half housing, and the off-axis parabolic mirror is located in the left optical path channel. An L-shaped right optical path channel is formed in the right half housing, and another off-axis parabolic mirror is located in the right optical path channel. The left optical path channel is communicated with the right optical path channel through the notch, and the right optical path channel is communicated with the light outlet of the wide-spectrum laser light source structure;

[0009] The motor is connected to the mirror housing, the output end of the motor is connected to the center of the filter turntable. A plurality of uniformly spaced mounting holes are formed in the circumferential direction of the filter turntable, and the center of the circle of this circumference is the center of the filter turntable. A color filter is connected in the mounting hole, and one of the mounting holes of the filter turntable is located in the notch of the mirror housing;

[0010] The left half housing is connected with a focusing mount, the light inlet of the focusing mount is communicated with the left optical path channel on the left half housing, and an optical fiber is connected in the focusing mount;

[0011] The wide-spectrum laser light source structure emits light, and the light enters the right optical path channel of the mirror housing through the light outlet of the wide-spectrum laser light source structure, and forms a collimated light beam after being reflected by the off-axis parabolic mirror in the right optical path channel. The collimated light beam then enters the left optical path channel of the mirror housing after passing through the color filter on the filter turntable, and is reflected by the off-axis parabolic mirror in the left optical path channel and converges at the focus, and the focus converges on the optical fiber, and the light beam exits from the optical fiber.

[0012] As a further improved technical solution of the present invention, the height of the convergence point of the light beam emitted by the off-axis parabolic mirror in the left optical path channel is the same as that of the light outlet of the wide-spectrum laser light source structure.

[0013] As a further improved technical solution of the present invention, the two off-axis parabolic mirrors are respectively fixedly connected to a left mirror mount and a right mirror mount;

[0014] A left mounting hole is provided on the left half housing of the mirror housing, the left mounting hole is communicated with the L-shaped left optical path channel, and the off-axis parabolic mirror on the left mirror mount extends into the left optical path channel from the left mounting hole, and the left mirror mount is connected to the left half housing through screws and set screws;

[0015] On the right half of the mirror housing, there is a right mounting hole, which is connected to the L-shaped right optical path channel. The off-axis parabolic mirror on the right mirror base extends into the right optical path channel through the right mounting hole, and the right mirror base is connected to the right half of the housing by screws and set screws.

[0016] As a further improved technical solution of the present invention, the motor is connected to the mirror housing through a motor mounting plate.

[0017] As a further improved technical solution of the present invention, the focusing seat includes an optical fiber focusing seat, an optical fiber centering seat, a pin, an SMA socket sleeve, an adjusting screw sleeve, and an SMA socket. The optical fiber focusing seat is sleeved outside the optical fiber centering seat, the adjusting screw sleeve is sleeved outside the optical fiber focusing seat. Pin holes are provided on both the optical fiber centering seat and the adjusting screw sleeve. A strip hole is provided on the optical fiber focusing seat. The pin sequentially passes through the pin hole of the adjusting screw sleeve, the strip hole on the optical fiber focusing seat, and the pin hole of the optical fiber centering seat. A tightening threaded through hole is also provided on the optical fiber focusing seat. The optical fiber focusing seat is used to lock with the optical fiber centering seat through this tightening threaded through hole and a set screw. The optical fiber centering seat is connected to the SMA socket sleeve by a set screw, and the SMA socket sleeve is connected to the SMA socket by a screw.

[0018] As a further improved technical solution of the present invention, a rubber ring is also connected to the outside of the adjusting screw sleeve.

[0019] As a further improved technical solution of the present invention, the broadband laser light source structure contains a broadband laser light source.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention provides a device for converting a broadband laser light source into a tunable laser light source. Compared with the conventional conversion of a broadband laser light source into a tunable laser light source, it is no longer limited to the position of the color filter. The color filter can be placed arbitrarily, and multiple groups of color filters can be placed simultaneously through the filter turntable, which is more convenient to use and has a simpler structure. It can also meet the requirement of emitting light with a specified wavelength.

[0022] The utility model adopts an off-axis parabolic mirror, which can focus parallel light beams or collimate point light sources without dispersion. Its off-axis design can separate the focus from the optical path. When a collimated light beam is incident vertically on the bottom of the mirror substrate, the reflected light will converge at the focus position. By placing a point light source at the focus, a collimated light beam can be obtained. Its feature is that the light emitted by the laser light source first becomes a collimated light beam through the first off-axis parabolic mirror, thereby extending the usable beam length, and then passes through the second off-axis parabolic mirror to restore the light beam. Since the light becomes a collimated light beam after passing through the first off-axis parabolic mirror, the position of the color filter is no longer limited. The same size of color filter can be placed at different positions, that is, there is no need to replace color filters of different sizes according to the placement position of the color filter. The color filter can be placed arbitrarily, and multiple groups of color filters are installed on the filter wheel at the same time. When the wavelength needs to be changed, the filter wheel is rotated by a motor to replace the required color filter, without replacing the color filter by plugging and unplugging, which will not affect the stability of the optical system, making it more convenient to use and the structure simpler. Similarly, by rotating the filter wheel to select the required color filter, the requirement of emitting light of a specified wavelength can be met, and the stability of the optical system is higher.

[0023] During the installation of the present utility model, according to the focal length of the off-axis parabolic mirror on the right mirror base, the distance from the center of the off-axis parabolic mirror in the right half shell of the mirror housing to the light outlet of the wide-spectrum laser light source structure can be obtained. The structural shape and size of the mirror housing are precisely designed to ensure that the height of the off-axis parabolic mirror in the right half shell of the mirror housing is consistent with the light outlet of the wide-spectrum laser light source structure, and to ensure that the distance between the two is equal to the focal length of the off-axis parabolic mirror on the right half shell. Thus, the light beam reflected from the off-axis parabolic mirror on the right half shell is collimated. Observe whether the outgoing light beam is consistent with the size, height, and levelness at a nearby location as far as possible. Since the dimensional accuracy and distance are ensured during the production of the tooling, basically no adjustment is required for the two to ensure that the light beam reflected from the off-axis parabolic mirror on the right half shell is collimated. Subsequently, the motor and the filter turntable are combined and installed in the device. The filter turntable can be rotated by the motor to replace the color filter, so that the light beam passes through the color filter and then hits the off-axis parabolic mirror in the left half shell. After being reflected by the off-axis parabolic mirror in the left half shell, the reflected light converges at the focal point. When the dimensional accuracy of the mirror housing in the device and the installation position accuracy between the mirror housing and the off-axis parabolic mirror are ensured, after assembling each structure, it is possible to ensure that the height of the converging light beam is consistent with the light outlet of the wide-spectrum laser light source structure without adjustment. Finally, the focusing seat is installed, and the optical fiber is inserted into the focusing seat. By adjusting the focusing seat, the light beam focus converges on the optical fiber, and finally the light beam exits from the optical fiber, and it is ensured that the exit angle of the light beam from the optical fiber on the focusing seat is consistent with the exit angle of the wide-spectrum laser light source, without affecting the exit angle of the light. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present utility model Figure 1 .

[0025] Figure 2 is a schematic diagram of the overall structure of the present utility model Figure 2 .

[0026] Figure 3 is the front view of the present utility model.

[0027] Figure 4 is Figure 3 the sectional view taken along line A-A in

[0028] Figure 5 is the top view of the present utility model.

[0029] Figure 6 is Figure 5 the sectional view taken along line B-B in

[0030] Figure 7It is a schematic structural diagram of the focusing base.

[0031] Figure 8 It is a schematic diagram of the connection between the mirror housing and the off-axis parabolic mirror Figure 1 .

[0032] Figure 9 It is a schematic diagram of the connection between the mirror housing and the off-axis parabolic mirror Figure 2 .

[0033] Figure 10 It is a relative position diagram of two off-axis parabolic mirrors.

[0034] Figure 11 It is a schematic structural diagram of the mirror housing Figure 1 .

[0035] Figure 12 It is a schematic structural diagram of the mirror housing Figure 2 .

[0036] Figure 13 It is a schematic structural diagram of the mirror housing Figure 3 . Specific embodiments

[0037] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings:

[0038] As Figures 1-6 shown, a device for converting a broadband laser light source into a tunable laser light source includes a broadband laser light source structure 1, an off-axis parabolic mirror 8, a mirror housing 2, a filter turntable 4, a motor 5, and a focusing base 3. The broadband laser light source structure 1 is installed on the bottom plate. The broadband laser light source structure 1 is connected to a power supply.

[0039] The mirror housing 2 is connected to the broadband laser light source structure 1 by screws and set screws.

[0040] As Figures 8-13 shown, a notch 203 is formed in the middle of the mirror housing 2, and the notch 203 divides the mirror housing 2 into a left half housing 202 and a right half housing 201. An L-shaped left optical path channel 2021 is formed in the left half housing 202, and the off-axis parabolic mirror 8 is located in the left optical path channel 2021. An L-shaped right optical path channel 2011 is formed in the right half housing 201, and another off-axis parabolic mirror 8 is located in the right optical path channel 2011; the left optical path channel 2021 is communicated with the right optical path channel 2011 through the notch 203, and the right optical path channel 2011 is communicated with the light outlet of the broadband laser light source structure 1.

[0041] In this embodiment, the two off-axis parabolic mirrors 8 are respectively fixedly connected to the left mirror base 7 and the right mirror base 6.

[0042] On the left half shell 202 of the mirror housing 2, a left mounting hole 2022 is provided. The left mounting hole 2022 communicates with the L-shaped left optical path channel 2021. The off-axis parabolic mirror 8 on the left mirror base 7 extends into the left optical path channel 2021 from the left mounting hole 2022, and the left mirror base 7 is connected to the left half shell 202 by screws and setscrews.

[0043] On the right half shell 201 of the mirror housing 2, a right mounting hole 2012 is provided. The right mounting hole 2012 communicates with the L-shaped right optical path channel 2011. The off-axis parabolic mirror 8 on the right mirror base 6 extends into the right optical path channel 2011 from the right mounting hole 2012, and the right mirror base 6 is connected to the right half shell 201 by screws and setscrews.

[0044] The motor 5 is connected to the mirror housing 2 through a motor mounting plate. The output end of the motor 5 is connected to the center of the filter turntable 4. A plurality of uniformly spaced mounting holes 401 are provided in the circumferential direction of the filter turntable 4. A color filter can be connected in each mounting hole 401. The color filter is used to transmit light of a specific wavelength. The color filter in a certain mounting hole 401 of the filter turntable 4 can be located in the notch 203 of the mirror housing 2. The motor 5 is connected to a power source. When the motor 5 is started, the motor 5 can drive the filter turntable 4 to rotate, so that the plurality of color filters on the filter turntable 4 rotate around the center of the filter turntable 4, and then the color filter located in the notch 203 of the mirror housing 2 is replaced. Which color filter is needed, just rotate the color filter to the notch 203. The specific control method of the rotation angle of the motor 5 adopts the existing technology and is controlled by an external controller. In order to obtain a more stable structure, the filter turntable 4 can also be rotationally supported on the mirror housing 2.

[0045] A focusing seat 3 is connected to the left half shell 202. The light inlet of the focusing seat 3 communicates with the left optical path channel 2021 on the left half shell 202. An optical fiber is connected in the focusing seat 3.

[0046] The wide-spectrum laser light source structure 1 is connected to a power supply. After the wide-spectrum laser light source structure 1 emits light, the light enters the right optical path channel 2011 of the mirror housing 2 through the light-emitting port of the wide-spectrum laser light source structure 1, and is reflected by the off-axis parabolic mirror 8 in the right optical path channel 2011 to form a collimated beam. The collimated beam then passes through the color filter on the filter turntable 4 located in the notch 203 of the mirror housing 2 and enters the left optical path channel 2021 of the mirror housing 2, and is reflected by the off-axis parabolic mirror 8 in the left optical path channel 2021 and converges at the focus. The focus then converges on the optical fiber on the focusing base 3, and the light beam exits from the optical fiber. Among them, the size of the color filter is larger than the width of the emitted collimated beam, so that the color filter can receive all the collimated beams.

[0047] In this embodiment, the height of the light beam convergence point of the off-axis parabolic mirror 8 in the left optical path channel 2021 is the same as that of the light-emitting port of the wide-spectrum laser light source structure 1.

[0048] In this embodiment, as Figures 3-7 shown, the focusing base 3 includes an optical fiber focusing seat 301, an optical fiber centering seat 304, a pin 307, an SMA socket sleeve 305, an adjusting screw sleeve 303, and an SMA socket 306. The optical fiber focusing seat 301 is sleeved outside the optical fiber centering seat 304, and the two can slide relative to each other. The adjusting screw sleeve 303 is sleeved outside the optical fiber focusing seat 301. Both the optical fiber centering seat 304 and the adjusting screw sleeve 303 are provided with pin holes. A strip hole 3011 is opened on the optical fiber focusing seat 301. The pin 307 sequentially passes through the pin hole of the adjusting screw sleeve 303, the strip hole 3011 on the optical fiber focusing seat 301, and the pin hole of the optical fiber centering seat 304. A tightening threaded through hole is also provided on the optical fiber focusing seat 301. The optical fiber focusing seat 301 is used to lock with the optical fiber centering seat 304 through this tightening threaded through hole and a set screw. The set screw is used to tighten the optical fiber centering seat 304. The optical fiber centering seat 304 is connected to the SMA socket sleeve 305 through a set screw. The SMA socket sleeve 305 is connected to the SMA socket 306 through a screw. Specifically: a groove is provided on one end face of the SMA socket sleeve 305, and one end face of the SMA socket 306 is placed in the groove, and the SMA socket sleeve 305 and the SMA socket 306 are then connected through a screw. The SMA socket 306 is connected to the optical fiber through an optical fiber connector. After the optical fiber connector is connected to the SMA socket 306 (such as threaded connection), the end of the optical fiber on the optical fiber connector is flush with the contact surface between the end face of the SMA socket 306 and the inner end face of the groove of the SMA socket sleeve 305.

[0049] Figure 6 The red structure in is the light ray 9. The light is reflected by the off-axis parabolic mirror 8 in the left optical path channel 2021 and converges at the focus. The function of the focusing base 3 is to make the focus converge on the optical fiber in the optical fiber connector on the focusing base 3.

[0050] When adjusting the focusing seat 3, remove the SMA socket 306, loosen the set screw in the tightening threaded through-hole on the optical fiber focusing seat 301, and then loosen the optical fiber centering seat 304. Slide the adjusting sleeve 303. The adjusting sleeve 303 drives the optical fiber centering seat 304 to move inside the optical fiber focusing seat 301 through the pin 307. At this time, the pin 307 moves in the strip-shaped hole 3011 on the optical fiber focusing seat 301. Place a thin piece of paper on the inner end face of the groove of the SMA socket sleeve 305, turn on the light source in the wide-spectrum laser light source structure 1. When the light converges to the smallest and brightest point on the thin piece of paper, at this time, the beam focus converges on the end face of the SMA socket sleeve 305. Lock it with a set screw into the tightening threaded through-hole on the optical fiber focusing seat 301, and then lock the position of the optical fiber centering seat 304. Connect the SMA socket 306 to the SMA socket sleeve 305 with screws. Since the end face of the SMA socket 306 contacts the inner end face of the groove of the SMA socket sleeve 305, at this time, the beam focus converges on the end face of the SMA socket 306. Install an optical fiber connector into the SMA socket 306. After installing the optical fiber connector, the end of the optical fiber inside the optical fiber connector is flush with the end face of the SMA socket 306, and the beam focus converges on the optical fiber. The method for judging whether the convergence point of the outgoing beam of the off-axis parabolic mirror 8 converges on the optical fiber can also adopt other existing methods, not limited to the above method.

[0051] In this embodiment, a rubber ring 302 is further connected to the outside of the adjusting sleeve 303.

[0052] In this embodiment, the wide-spectrum laser light source structure 1 contains a wide-spectrum laser light source. The wide-spectrum laser light source emits light from the light outlet.

[0053] This device adds a mirror housing 2, a left mirror seat 7, a right mirror seat 6, a motor 5, a filter turntable 4, a focusing seat 3, and an off-axis parabolic mirror 8 on the basis of the original wide-spectrum laser light source structure 1 to realize the conversion of wide-spectrum light into tunable light. The wavelength is tunable by replacing the color filter. Different color filters have different wavelengths of transmitted light.

[0054] The assembly process of this device is as follows: First, fix the off-axis parabolic mirror 8 on the left mirror seat 7 and the right mirror seat 6 respectively, then fix the left mirror seat 7 and the right mirror seat 6 on the mirror housing 2 through bolts respectively, and then connect the mirror housing 2 to the housing of the wide-spectrum laser light source structure 1 with screws and set screws. Subsequently, after installing the motor 5 and the filter turntable 4 together, fix the motor 5 on the mirror housing 2, and finally install the focusing seat 3 behind the light outlet of the mirror housing 2. The optical fiber focusing seat 301 of the focusing seat 3 is connected to the light outlet of the mirror housing 2 with screws.

[0055] The device is implemented by adopting the principle of off-axis parabolic reflector 8. During the installation process, the distance from the center of the off-axis parabolic reflector 8 in the right half shell 201 of the reflector housing 2 to the light outlet of the wide-spectrum laser light source structure 1 can be obtained according to the focal length of the off-axis parabolic reflector 8. The structure and size of the reflector housing 2 are accurately designed to ensure that the height of the off-axis parabolic reflector 8 in the right half shell 201 of the reflector housing 2 and the light outlet of the wide-spectrum laser light source structure 1 are consistent, and the distance between the two is equal to the focal length of the off-axis parabolic reflector 8 on the right half shell 201, so that the light reflected from the off-axis parabolic reflector 8 on the right half shell 201 is The emitted light beam is collimated. Observe from as far away as possible to see if the emitted light beam is consistent with the size, height and levelness at the nearby position. Since the dimensional accuracy and distance are guaranteed when the tooling is manufactured, the two basically do not need to be adjusted, so that the light beam reflected from the off-axis parabolic reflector 8 on the right half shell 201 can be guaranteed to be collimated. If it cannot be achieved by any means, it is necessary to use a top screw to fine-tune the inclination angle of the off-axis parabolic reflector 8 on the right half shell 201. After adjustment, tighten the right reflector seat 6 of the off-axis parabolic reflector 8 with screws to ensure that the light reflected by the off-axis parabolic reflector 8 on the right half shell 201 is a collimated light beam. Subsequently, the motor 5 and the filter wheel 4 are combined and installed in the device. The filter wheel 4 can be controlled to rotate by the motor 5 to replace the color filter, so that the light beam passes through the color filter and then hits the off-axis parabolic reflector 8 in the left half shell 202. After being reflected by the off-axis parabolic reflector 8 in the left half shell 202, the reflected light is converged at the focus. Under the condition of ensuring the accuracy of the tooling size, after assembling the various structures, it is possible to ensure that the height of the converged light beam is consistent with the light outlet of the wide-spectrum laser light source structure 1 without adjustment. If it cannot be achieved by chance, it can be fine-tuned by using the tolerance of the left reflector seat 7 and the reflector shell 2 to rotate the left reflector seat 7, thereby adjusting the convergence point of the light beam emitted by the off-axis parabolic reflector 8 in the left half shell 202 to be consistent with the height of the light outlet of the wide-spectrum laser light source structure 1. Finally, the focusing seat 3 is installed, and the optical fiber is inserted into the focusing seat 3. By adjusting the focusing seat 3, the focus of the light beam is converged on the optical fiber, and finally the light beam is emitted from the optical fiber, and the emission angle of the light beam from the optical fiber is ensured to be consistent with the emission angle of the laser.

[0056] The traditional method is to add a color filter after the light exits the optical fiber. There are often certain limitations on the position of the color filter. The farther the distance from the fiber optic head, the larger the required color filter (the farther the color filter is from the fiber optic head, the more dispersed the light reaching the color filter after exiting the fiber optic head, so the larger the required color filter). And if it is necessary to change the wavelength of the light, it may be necessary to replace the color filter by plugging and unplugging, which may affect the stability of the optical system. In the wide-spectrum laser light source structure 1 of this device, the laser light source becomes a collimated beam through the first off-axis parabolic mirror 8, so that the available beam length can be extended. Therefore, the position of the color filter is no longer limited, and the same size of color filter can be used at different positions to place the color filter, that is, there is no need to change the color filter of different sizes according to the placement position of the color filter, and the color filter can be placed arbitrarily. Therefore, the position of the filter turntable 4 of this utility model can be set arbitrarily, and there is no need to adjust the size of the color filter according to the position of the filter turntable 4.

[0057] The most critical component of this device is the off-axis parabolic mirror 8. The off-axis parabolic mirror 8 is a surface mirror, and its reflective surface is a part intercepted from the parent paraboloid. The off-axis parabolic mirror 8 can focus parallel beams or collimate point sources without dispersion, and its off-axis design can separate the focus from the optical path. When the collimated beam is incident perpendicularly on the bottom of the mirror substrate, the reflected light will converge at the focal position. Placing a point source at the focal point can obtain a collimated beam.

[0058] The light emitted by the laser light source in the wide-spectrum laser light source structure 1 first becomes a collimated beam through the first off-axis parabolic mirror 8, so that the available beam length can be extended, and then passes through the second off-axis parabolic mirror 8 to restore the beam.

[0059] The protection scope of this utility model includes but is not limited to the above embodiments. The protection scope of this utility model is subject to the claims. Any replacement, deformation, and improvement that are easily conceivable by those skilled in the art to this technology fall within the protection scope of this utility model.

Claims

1. An apparatus for converting a wide-spectrum laser light source into a tunable laser light source, characterized in that, It includes a wide-spectrum laser light source structure, an off-axis parabolic mirror, a mirror housing, a filter turntable, a motor, and a focusing seat; The mirror housing is connected to the wide-spectrum laser light source structure; A notch is provided in the middle of the mirror housing, and the notch divides the mirror housing into a left half housing and a right half housing. An L-shaped left optical path channel is provided on the left half housing, and the off-axis parabolic mirror is located in the left optical path channel. An L-shaped right optical path channel is provided on the right half housing, and another off-axis parabolic mirror is located in the right optical path channel. The left optical path channel is connected to the right optical path channel through the notch, and the right optical path channel is connected to the light outlet of the wide-spectrum laser light source structure; The motor is connected to the mirror housing, the output end of the motor is connected to the center of the filter turntable. A plurality of uniformly spaced mounting holes are provided in the circumferential direction of the filter turntable. A color filter is connected in the mounting hole, and one of the mounting holes of the filter turntable is located in the notch of the mirror housing; A focusing seat is connected to the left half housing of the mirror housing. The light inlet of the focusing seat is connected to the left optical path channel on the left half housing, and an optical fiber is connected in the focusing seat; The wide-spectrum laser light source structure emits light. The light enters the right optical path channel of the mirror housing through the light outlet of the wide-spectrum laser light source structure, is reflected by the off-axis parabolic mirror in the right optical path channel to form a collimated beam. The collimated beam then passes through the color filter on the filter turntable and enters the left optical path channel of the mirror housing, and is reflected by the off-axis parabolic mirror in the left optical path channel and converges at the focus. The focus then converges on the optical fiber in the focusing seat, and the light beam exits from the optical fiber.

2. The device for converting a wide-spectrum laser light source into a tunable laser light source according to claim 1, characterized in that, The height of the convergence point of the light beam emitted by the off-axis parabolic mirror in the left optical path channel is the same as the height of the light outlet of the wide-spectrum laser light source structure.

3. The device for converting a broadband laser light source into a tunable laser light source according to claim 1, characterized in that, The two off-axis parabolic mirrors are respectively fixedly connected to a left mirror seat and a right mirror seat; A left mounting hole is provided on the left half housing of the mirror housing. The left mounting hole is connected to the L-shaped left optical path channel. The off-axis parabolic mirror on the left mirror seat extends into the left optical path channel from the left mounting hole, and the left mirror seat is connected to the left half housing through screws and set screws; A right mounting hole is provided on the right half housing of the mirror housing. The right mounting hole is connected to the L-shaped right optical path channel. The off-axis parabolic mirror on the right mirror seat extends into the right optical path channel from the right mounting hole, and the right mirror seat is connected to the right half housing through screws and set screws.

4. The device for converting a broadband laser light source into a tunable laser light source according to claim 1, wherein, The motor is connected to the mirror housing through a motor mounting plate.

5. The device for converting a broadband laser light source into a tunable laser light source according to claim 1, characterized in that, The focusing base includes an optical fiber focusing base, an optical fiber centering base, a pin, an SMA socket sleeve, an adjusting screw sleeve, and an SMA socket. The optical fiber focusing base is sleeved outside the optical fiber centering base, and the adjusting screw sleeve is sleeved outside the optical fiber focusing base. Pin holes are provided on both the optical fiber centering base and the adjusting screw sleeve. A strip-shaped hole is formed on the optical fiber focusing base. The pin sequentially passes through the pin hole of the adjusting screw sleeve, the strip-shaped hole on the optical fiber focusing base, and the pin hole of the optical fiber centering base. A tightening threaded through hole is further provided on the optical fiber focusing base. The optical fiber focusing base is used to lock with the optical fiber centering base through the tightening threaded through hole and a setscrew. The optical fiber centering base is connected to the SMA socket sleeve through a setscrew, and the SMA socket sleeve is connected to the SMA socket through a screw.

6. The device for converting a broadband laser light source into a tunable laser light source according to claim 5, characterized in that, A rubber ring is further connected to the outside of the adjusting screw sleeve.

7. The device for converting a broadband laser light source into a tunable laser light source according to claim 1, characterized in that, The broadband laser light source structure contains a broadband laser light source.

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